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POWhat does "org.hibernate.DuplicateMappingException" error mean?
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copied!<p>I'm trying to force JPA/Hibernate to generate and use only lowercase tablenames. I've implemented a NamingStrategy like this:</p> <pre><code>public class MyNamingStrategy extends DefaultNamingStrategy { @Override public String classToTableName(String className) { return super.classToTableName(className).toLowerCase(); } } </code></pre> <p>I have applied it by setting this property in persistence.xml:</p> <pre><code><property name="hibernate.ejb.naming_strategy" value="entities.strategy.MyNamingStrategy"/> </code></pre> <p>When I do this I get this stacktrace:</p> <pre><code>SEVERE: Exception while invoking class org.glassfish.persistence.jpa.JPADeployer prepare method org.hibernate.DuplicateMappingException: Same physical table name [planning] references several logical table names: [Planning], [OrderProductMan_Planning] at org.hibernate.cfg.Configuration$MappingsImpl.addTableBinding(Configuration.java:2629) at org.hibernate.cfg.annotations.TableBinder.buildAndFillTable(TableBinder.java:254) at org.hibernate.cfg.annotations.TableBinder.bind(TableBinder.java:177) </code></pre> <p>What does the </p> <blockquote> <p>Same physical table name [planning] references several logical table names: [Planning], [OrderProductMan_Planning] </p> </blockquote> <p>mean?</p> <p>Entities from the error, simplified as much as I could. Let me know if you need the rest.</p> <pre><code>@Entity public class Planning implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Integer id; private Integer qty; @ManyToOne private OrderProductMan orderProduct; .... } @Entity @Table public class OrderProductMan implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Basic(optional = false) private Integer opId; @Basic(optional = false) private int qty; @ManyToOne(optional = false) private ProductMan produse; @ManyToOne(optional = false) private OrderMan orders; @Transient private int totalScheduled; @Transient private int totalProduced; // ... } </code></pre>

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